Engine



INVENTOR.

Mllz'am l Vaddeli ATTORNEY.

W. WADDELL ENGINE Filed NOV. 17, 1930 Oct. 30, 1934.

. Patented Oct. 30, 1934 ENGINE William'WaddelhDeti-oit, Mich.,- assignorto Continental Motors Corporation, Detroit, Mich, a corporation of Virginia Application November 17, 1930, Serial 'No. 496,057

'1 Y 2'Claims.

Myinye'ntion relates to sleeve'valve engine construction uand more-particularly to the cylinder and cylinder head construction employed with engines of -the aforesaid type.

' Difiiculty' hasbeenpexperienced in accurately aligning or centering-the cylinder head structure with respect-tothe cylinder'of a sleeve valve engine, in which the cylinder headdepends within the cylinder-and -is-spaced therefrom to provide asleeve pocket adapted for receiving sleeve valve means. It is quite essential that that portion of the cylinder headstructure which depends within the cylinder, be-accurately centered and axially aligned withthe cylinder, since any tilting of the .2 a header-tor-which-the cylinder head jackets may beconnected, and the cooling liquid such as wa-'- ter, IPrestone, or other similar li'quidsis caused .to circulate through the block, thence into the header, and then through thecylinderheadjacket.

I One of the disadvantages with a cooling system vof this character is thatthe connections between the-header and a-number of cylinder heads must be broken-whehever-a single head has to be removed'or'repaired.

Oneof the objects ofmy present'invention is to facilitate the accurate centeringof-thecylinder head'inthe.cylinderof a sleeve valve internal combustion engine and the accurate alignment of the head with respect to the cylinder axis by providing piloting means to locate the cylinder head in a fixed predetermined position with respect to the cylinder bore.

Another object of my invention is to construct an improved cooling system for an internal combustion engine of the sleeve valve type having a reentrant cylinder head structure by providing individual connecting means for connecting the jacket of each cylinder head structure with the jacket of the cylinder block of said engine.

For a more detailed understanding of my invention, reference may be had to the accompanying drawing which illustrates one form which my invention may assume, and in which:

Figure 1 is a transverse vertical sectional view of a portion of a sleeve valve internal combustion engine illustrating one embodiment of my invention,

Figure 2 is a plan sectional view thereof taken substantially on the line 2-2 of Figure 1,

Figure 3 is a detailed sectional view through one of the individual connecting means and taken on the'line 3-3 of Figure 2, and

Figure 4-is an enlarged viewthrough one of the individual cooling liquid connections.

In general, a sleeve valve internal combustion engine includes a cylinder structure A having a cylinder 10, a piston 11 operating in the cylinder, sleeve valve means B which may consist of one or more sleeve valves, and a cylinder head structure C depending within the cylinder and spaced therefrom to provide asleeve pocket adapted-for receiving the upper portion of the sleeve valve means. Various types of sleeve valve means may be employed, but I have chosen, for the purposes of-illustration, to show my'invention incorporated in a single sleeve valve engine in which the sleeve is given a combined reciprocating and oscillating movement with respect to the cylinder and sleeve axis, and any point on the sleeve traces a closed path.

Thecylinder 10 may be ported for-intake and exhaust as well as thesleeve valve means, andthe reentrant cylinder head is preferably provided :with combustionchamber 12 and-one or more spark plugs 13, saidhead having a-jacket portion 14 substantially surrounding the combustion chamber in' which a cooling liquid may be circulated.

The cylinder block orstructure -A isprovided with-a jacket portion 15 in-which a cooling liquid is circulated; the jacket portions of-saidcylinder structure and cylinder head structure comiected together by a. means hereinafter described. The cylinder 10 is counterbored adjacent the top of the cylinder block thereby providing an enlarged bore 16 substantially parallel and co-axial with respect to the axis of the cylinder 10. The top portion 17 of the cylinder head structure has a diameter substantially the same as the enlarged bore 16, and preferably a few thousandths less in order to permit the head to fit snugly within the enlarged bore. This enlarged bore may be designated a piloting means and the enlarged portion of the cylinder head may be designated a pilot portion. Thus, the cylinder head is piloted in the cylinder structure and accurately centered and axially aligned with the cylinder, thereby positioning the depending portion of the head concentrically within the cylinder bore, and substantially eliminating the tendency for the head to tilt with respect to said cylinder. I preferably provide a gasket 18 on the underside of the enlarged portion of the head, the gasket seating on the shoulder 19 formed by counterboring the cylinder.

This construction, in which a portion of the cylinder head is piloted in the counterbored recess or bore 16, provides a structure which lends itself readily to my novel means of individually connecting the jacket portion of the cylinder head with the jacket portion of the cylinder structure. The cylinder structure is provided preferably with a plurality of lateral passages 20 opening into the counterbored recess 16 and the cylinder head is preferably provided with the lateral passages 21 opening through the side cylindrical face of the enlarged portion of the head, these lateral passages adapted to register on assembly of the head with the cylinder structure to provide a liquid connection between said jacket portions Ion-- ply of cooling fluid is thereby more readily circulated through each cylinder head transversely of the engine. It is preferable, when such connections are provided, to employ a gasket 22 above the connection to efiectively seal the joint against leakage.

It will thus be noted that individual liquid connections are provided, thus making it possible to remove any one of the cylinder heads of a multicylinder engine without disturbing the liquid seal of the remaining cylinder heads.

I preferably provide a junk ring 23 surrounding the reentrant portion of the cylinder head which will accommodate itself to any inaccuracy in the assembly, though care in accurately machining the counterbored recess 16 and the pilot portion of the head may eliminate the necessity for employing a junk ring. More accuracy in positioning the cylinder head may be obtained by providing a pilot means of greater length.

It may be further noted that the enlarged bore or recess 16, which is considerably larger than the cylinder bore 10, permits the use of a piston ring compressing tool in assembling the head. The

construction herein described and illustrated may be economically manufactured and assembled, and much better results can thus be obtained because of the increased accuracy in which the head may be located in a predetermined fixed position with respect to the cylinder bore.

Although I have illustrated but one form of my invention and have described in detail but a single application thereof, it will be apparent to those skilled in the art to which my invention pertains that various modifications and changes may be made therein without departing from the spirit of my invention or from the scope of the appended claims.

What I claim as my invention is:

1. In an engine having multiple aligned cylinders and a cooperating jacket portion through which a cooling medium is circulated, individual cylinder heads aligned longitudinally of the engine and removably secured tosaid cylinders and each having a jacketed re-entrant portion depending within the cylinder and a pilot portion, each of said cylinders having an enlarged bore constructed for cooperation with the cylinder head pilot to locate the cylinder head with respect to the associatedcylinder, the enlarged cylinder bores having lateral openings, said re-entrant cylinder head portions having lateral openings cooperating with the cylinder openings. to provide lateral passages across the respective jackets of the cylinder heads through, which said cooling medium may circulate, the openings of adjacent cylinder bores being arranged to provide longitudinally extending passages through which the cooling medium may circulate between the jackets of adjacent cylinder heads along one side of said engine.

2. In an engine having multiple aligned cylinders and a cooperating jacket portion through which a cooling medium is circulated, individual cylinder heads aligned longitudinally of the engine and removably secured to said cylinders and each having a jacketed re-entrant portion depending within the cylinder and a pilot portion, each of said cylinders having an enlarged bore constructed for cooperation with the cylinder head pilot to locate the cylinder head with respect to the associatedcylinder, the enlarged cylinder bores having lateral openings, said re-entrant cylinder head portions having lateral openings cooperatin'g'with the cylinder openings to provide lateral passages across the respective jackets of the cylinder heads through which said cooling medium may circulate, the openings of adjacent cylinder bores being arranged -to provide longitudinally extending passages through which the cooling medium may circulate between' the jackets of adjacent cylinder heads along both sides of said engine.- 1

I WILLIAM WADDELL.

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